victor blackwell is on assignment. 7:00 on the east coast and 4:00 out west. thank you for starting your day with us. we start this morning in israel where troops are massing on the border with gaza this morning. the move comes days after back and forth bombardments. israel has launched dozens of air strikes while militants in gaza have fired nearly 200 rockets into israel. we are on both sides of the border in the line of fire. our sara sidner is in gaza city. let's go to southern israel where israeli tanks are on the move. the israeli defense forces say at least 30,000 troops are being mobilized along the border with gaza and thousands more are getting their marching orders. as we said, cnn's frederick is live along the border. you have been on the front lines there. what type of military activity are you seeing? >> hi, randi. a lot of military activity going on here between the border area between gaza and israel. we just had armored vehicles come through here and moving in closer to the border. of course, a lot of people believe that israelis must launch a